Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. uv radiation is called ultraviolet because it has a frequency which is higher than violet radiation (purple light). therefore, it has a wavelength which is than violet radiation.
a) bigger
b) smaller
c) the same size
d) the square root of
8)
erosion of the beach is normally a slow process. what is one factor involved in this erosion?
a) animal motion
b) changing tides
c) emptying rivers
d) building coral reefs
9)

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.